Split type low temperature drying equipment warehouse body precision air control structure and method

Abstract

The application discloses a split low-temperature drying equipment warehouse body precise air control structure and method, relates to the sludge low-temperature drying technical field, and includes the warehouse body and the heat source center, the bottom of the warehouse body is connected with the dehumidification fan and the heating fan through the air pipe respectively, the top of the warehouse body is internally provided with the condenser, the condenser is connected with the heating fan through the pipeline, the heat source center is arranged outside the warehouse body, and the heat source center is connected with the dehumidification fan and the warehouse body through the pipeline;Wherein, the bottom of the warehouse body is spaced apart by the corresponding space through the partition baffle, and according to the air volume of the dehumidification circulating air generated by the dehumidification fan and the heating circulating air generated by the heating fan, the corresponding space is provided with the air diffuser or the flow guide plate to make the circulating air realize diffusion and paving in the horizontal direction and the vertical direction, and then the air speed of each position is same when the circulating air flows to the top direction of the warehouse body.The application is convenient for heating / dehumidification circulating air to be sent into from different sides of the warehouse body, and is beneficial to the precise control of the distribution of circulating air after entering the warehouse body.

Description

A Precision Air Control Structure and Method for a Split-Type Low-Temperature Drying Equipment Storage Unit Technical Field

[0001] This invention relates to the field of sludge low-temperature drying technology, specifically to a split-type low-temperature drying equipment storage chamber with precise air control structure and method. Background Technology

[0002] The working principle of the current sludge low-temperature drying machine is as follows: after the circulating air is processed by the dehumidification heat source center, it is divided into dehumidification circulating air and heating circulating air. The dehumidification circulating air enters from the bottom of the sludge drying chamber and then comes out from the top of the drying chamber, returning to the dehumidification heat source center. It circulates continuously from beginning to end. The heating circulating air is introduced from the side of the middle conveyor chain in the chamber by the heating fan. It mixes with the dehumidification air of the lower conveyor chain and rises. After passing through the remaining conveyor chain and filter, it comes out from the top of the chamber and returns to the heat source center.

[0003] Most existing low-temperature dryers are integrated structures. The dehumidification air is mainly drawn from the heat source center by a fan assembly (commonly consisting of a volute-less fan and a centrifugal fan) installed on one side of the bottom of the bottom layer of the conveyor chain network of the silo. The dehumidified and heated circulating air is then sent to the bottom layer of the conveyor chain network of the silo. Subsequently, the inertia of the circulating air movement and the obstruction of the surrounding silo walls change the air direction, and the air is dried upward through the conveyor chain network.

[0004] This single air supply method results in high wind speeds in the direction of inertia and at locations where the wind turns along the wall, while other areas receive very little airflow. This leads to areas with exceptionally high wind speeds on the bottom conveyor belt, while other areas experience very low wind speeds. These concentrated high-speed areas more easily disperse semi-dry sludge particles on the bottom conveyor belt, increasing dust levels in the silo. Consequently, sludge in high-speed areas dries easily but with low thermal efficiency, while low-speed areas lack sufficient heat and are difficult to dry. This also results in poor uniformity of sludge moisture content across different locations on the conveyor belt. Furthermore, the heating circulating air of the integrated dryer typically enters the conveyor belt from the middle side, which is also detrimental to airflow distribution. Since the air is supplied from the middle, this portion of the air can only pass through one or two layers of the conveyor belt, resulting in low thermal efficiency and hindering system energy conservation. Summary of the Invention

[0005] To address the problem of uneven wind speed in existing storage tanks, this invention provides a split-type low-temperature drying equipment storage tank with precise air control structure and method. This allows for convenient separate delivery of heating and dehumidifying circulating air from different sides of the storage tank, which is beneficial for precise control of the distribution of circulating air after it enters the storage tank.

[0006] To achieve the above objectives, the present invention can adopt the following technical solutions:

[0007] In a first aspect, the present invention provides a split-type low-temperature drying equipment storage chamber with precise air control structure, comprising:

[0008] The storage unit has a dehumidifying fan and a heating fan connected to its bottom via air ducts. A condenser is installed inside the top of the storage unit, and the condenser is connected to the heating fan via a pipe.

[0009] A heat source center is located outside the storage body, and the heat source center is connected to the dehumidifying fan and the storage body through pipes;

[0010] The bottom of the storage unit is divided into corresponding spaces by partition baffles. According to the air volume of the dehumidifying circulating air generated by the dehumidifying fan and the heating circulating air generated by the heating fan, diffuser plates or guide plates are set in the corresponding spaces so that the circulating air can be diffused and spread in the horizontal and vertical directions, thereby making the wind speed at each position the same when the circulating air flows towards the top of the storage unit.

[0011] As described above, the split-type low-temperature drying equipment silo has a precise air control structure. Furthermore, the inlet of the silo is connected to a distributor for releasing sludge, and the silo is equipped with a conveying assembly, which is connected to the outlet of the distributor and the outlet of the silo.

[0012] The conveying assembly is positioned above the dehumidifying fan and the heating fan, and below the condenser, so that the sludge is dried and dehydrated by the dehumidifying circulating air and the heating circulating air during the conveying process.

[0013] As described above, the split-type low-temperature drying equipment silo has a precise air control structure. Furthermore, the conveying component includes several conveyor chains arranged from top to bottom. The uppermost conveyor chain is located below the discharge port of the distributor. The adjacent conveyor chains move in opposite directions and their beginning and end points are staggered to receive and convey sludge. The lowermost conveyor chain is located above the discharge port of the silo.

[0014] As described above, the split-type low-temperature drying equipment storage body has a precise air control structure. Furthermore, a number of diffuser plates are provided at the bottom of the storage body. The diffuser plates are close to the air outlet pipe of the dehumidifying fan and are inclined upward at a preset first angle. The diffuser plates are distributed at a preset first spacing, and the higher end of the uppermost diffuser plate and the lowermost transmission chain network satisfy a preset second spacing.

[0015] As described above, the split-type low-temperature drying equipment storage unit with precise air control structure further includes a diversion plate installed at the bottom of the storage unit. The diversion plate is located near the air outlet pipe of the heating fan. The diversion plate includes a diversion inclined plate and a diversion flat plate. The lower end of the diversion inclined plate is connected to the bottom of the storage unit. The diversion inclined plate is inclined upward at a preset second angle. The lower end of the diversion inclined plate is spaced at a preset third distance from the air inlet of the storage unit. The diversion flat plate is horizontally positioned, with one end connected to the higher end of the diversion inclined plate. The diversion flat plate is spaced at a preset fourth distance from the lowermost transmission chain network. The other end of the diversion flat plate is spaced at a preset fifth distance from the wall opposite the air inlet of the storage unit.

[0016] The split-type low-temperature drying equipment storage unit with precise air control structure, as described above, further includes a filter, which is disposed between the condenser and the conveying assembly.

[0017] As described above, in the split-type low-temperature drying equipment storage unit with precise air control structure, the air outlet pipe of the heating fan is trapezoidal in shape.

[0018] Secondly, the present invention provides a method for precise air control of a split-type low-temperature drying equipment storage unit, based on the aforementioned precise air control structure of the split-type low-temperature drying equipment storage unit, which includes the following steps:

[0019] Step 1: Using computer-aided software, model the split-type low-temperature drying equipment storage tank to obtain the air control structure model of the storage tank.

[0020] Step 2: Adjust the specifications of the diffuser and diversion plate in the wind control structure model of the silo body. Measure the wind speed of the circulating wind at multiple locations on the leeward side of the bottom transmission chain network inside the silo body, and obtain the standard deviation of the average wind speed on the leeward side of the bottom transmission chain network inside the silo body based on the wind speed of the circulating wind at multiple locations.

[0021] Step 3: Compare the standard deviation of the obtained average wind speed with the preset threshold to obtain the comparison result;

[0022] Step 4: Determine the air control structure of the warehouse based on the comparison results.

[0023] As described above, in the precise wind control method for the split-type low-temperature drying equipment storage unit, the specific method for obtaining the standard deviation of the average wind speed on the leeward side of the lowest transmission chain network inside the storage unit based on the specification parameters in step 2 is as follows:

[0024] The leeward side of the lowest transmission link network is set as the monitoring surface. m parallel line segments are taken at equal intervals along the length of the transmission link network in the width direction. The end points of the line segments are located at the beginning and end points of the transmission link network, respectively. n wind speed measurement points are set at equal intervals on each line segment. The standard deviation σ of the average wind speed of each line segment is calculated in this way.

[0025] The formula for calculating the standard deviation σ of the average wind speed is as follows:

[0026]

[0027] In the formula, σ is the standard deviation of the average wind speed of each point segment on the leeward side of the bottom transmission link network. This represents the average wind speed data at all points along a single line segment; v i For the measured velocity data, n is the number of wind speed test points on each line segment, and m is the number of line segments. This is the average of the average wind speeds across all line segments.

[0028] As described above, in the precise air control method for the split-type low-temperature drying equipment storage unit, the comparison standard in step 3 is further as follows:

[0029] If the standard deviation of the average wind speed is less than the preset threshold, proceed to step 4.

[0030] If the standard deviation of the average wind speed is not less than the preset threshold, then return to step 2.

[0031] Compared with the prior art, the advantages of this invention are as follows:

[0032] Compared to traditional integrated low-temperature dryers, this invention adopts a split structure, connecting the heat source center and the storage chamber via air ducts. Both dehumidifying and heating circulating air are introduced from different sides of the bottom of the storage chamber, effectively controlling the diffusion pattern of the circulating air after entering the chamber. This improves the uniformity of air velocity as it ascends through the lowest layer of the conveyor network and the mud layer, ensuring uniformity of air velocity in each layer of the conveyor network. It also reduces dust, improves energy utilization, and enhances the uniformity of mud moisture content across the width of the lowest layer of the conveyor network. This ensures long-term, stable, and efficient operation of the dehumidifying heat source center, reducing the frequency of maintenance. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 is a schematic diagram of the structure of the split-type low-temperature drying equipment according to an embodiment of the present invention (the dashed line represents the unseen position on the back of the storage body);

[0035] Figure 2 is a layout diagram of the diffuser plate according to an embodiment of the present invention;

[0036] Figure 3 is a layout diagram of the drainage plate according to an embodiment of the present invention;

[0037] Figure 4 is a mesh diagram of the three-dimensional model of the library body in an embodiment of the present invention;

[0038] Figure 5 is a flowchart for verifying the standard deviation of the average wind speed in an embodiment of the present invention;

[0039] Figure 6 is a cloud map of the upward wind speed on the monitoring surface according to an embodiment of the present invention (the line segments are the line segments where the wind speed values ​​are taken);

[0040] The components are as follows: 1. Heat source center; 2. Distributor; 3. Silo body; 4. Dehumidifying circulating air; 5. Dehumidifying fan; 6. Air outlet duct of the dehumidifying fan; 7. Bottom space of the silo body; 8. First heating circulating air; 9. Separating baffle; 10. First heating fan; 11. Second heating circulating air; 12. Second heating fan; 13. Air outlet duct of the heating fan; 14. Discharge port of the silo body; 15. Conveyor chain; 16. Sludge; 17. Baffle plate; 18. Filter; 19. Condenser; 20. Diffuser; 21. Drainage inclined plate; 22. Drainage plate; 23. Dust settling zone. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0042] Example:

[0043] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, in the embodiments of this invention are intended to cover non-exclusive inclusion; for example, a process, method, component, product, or device that includes a series of steps or means is not necessarily limited to those steps or means explicitly listed, but may include other steps or means not explicitly listed or inherent to such processes, methods, products, or devices.

[0044] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0045] In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] In a first aspect, the present invention provides a split-type low-temperature drying equipment storage structure with precise air control, comprising a storage body 3 and a heat source center 1. The bottom of the storage body 3 is connected to a dehumidifying fan 5 and a heating fan via air ducts. A condenser 19 is installed inside the top of the storage body 3 and is connected to the heating fan via a pipe. The heat source center 1 is located outside the storage body 3 and is connected to the dehumidifying fan 5 and the storage body 1 via a pipe. The bottom of the storage body 3 is divided into corresponding spaces by partition baffles 9. According to the air volume of the dehumidifying circulating air generated by the dehumidifying fan and the heating circulating air generated by the heating fan, diffusers or guide plates are installed in the corresponding spaces to make the circulating air diffuse and spread horizontally and vertically, thereby making the air velocity at each position the same when the circulating air flows towards the top of the storage body 3.

[0048] Specifically, compared to traditional integrated low-temperature dryers, this invention separates the heat source center 1 and the storage body 3, connecting them via air ducts. The air enters from different sides of the bottom of the storage body 3 according to the different types of dehumidifying and heating circulating air. Referring to Figure 1, the bottom of the storage body 3 has three air inlets: one for dehumidifying circulating air connected to the dehumidifying fan 5, and the other two for heating circulating air connected to the heating fans (first heating fan 10 and second heating fan 12). Each air inlet corresponds to a portion of space, and each space is separated by a partition baffle 9, allowing the corresponding airflow to be matched within that space. This ensures that the circulating air maintains the same velocity within the corresponding space, improving the uniformity of ventilation.

[0049] As an optional implementation, in some embodiments, the inlet of the silo 3 is connected to a distributor for releasing sludge, and a conveying assembly is provided inside the silo 3. The conveying assembly is connected to the outlet of the distributor 2 and the outlet of the silo 3, respectively. The conveying assembly is positioned above the dehumidifying fan and the heating fan, and below the condenser 19, so that the sludge 16 is dried and dewatered during conveying by the dehumidifying and heating circulating air. Further, the conveying assembly includes several conveyor chains 15 arranged from top to bottom. The uppermost conveyor chain 15 is positioned below the outlet of the distributor 2, adjacent conveyor chains 15 move in opposite directions, and their beginning and end points are staggered to receive and convey the sludge 16. The lowermost conveyor chain 15 is positioned above the outlet of the silo 3. Even further, a filter 18 is included, which is positioned between the condenser 19 and the conveying assembly.

[0050] Specifically, referring again to Figure 1, during the operation of this low-temperature dryer, sludge 16 is cut into strips by the distributor 2 and falls, spreading evenly onto the uppermost conveyor belt 15. The conveyor belt 15 is arranged horizontally in multiple layers from top to bottom within the silo body 1, and moves horizontally under the drive of the motor. The sludge 16 also falls from the end of each layer of the conveyor belt 15 to the next layer, and finally falls from the lowermost conveyor belt 15 to the discharge port of the silo body 3. During this process, heated circulating air enters from the bottom of the silo body 3, passes upward through the gaps of each layer of the conveyor belt 15 and the sludge layer, dries the wet sludge, removes moisture from the sludge, and then passes upward through the filter 18 before being discharged from the silo body 3.

[0051] In addition, the aforementioned circulating air is divided into two types: dehumidifying circulating air and heating circulating air. The heating circulating air is further divided into two streams according to the air volume: the first heating circulating air 8 and the second heating circulating air 11. The bottom space 7 of the storage body is divided into three parts according to the ratio of the three air volumes and separated by partitions 9. This ensures that the average wind speed passing through each section of the transmission chain 15 is the same or similar, thereby improving the uniformity of ventilation.

[0052] The dehumidifying circulating air 4 is dehydrated and heated by the heat source center 1 and then sent out. It is sent into the bottom of the silo 3 from one end by the dehumidifying fan 5, and then passes upward through the conveyor belt 15 and the sludge layer to dry the sludge and remove moisture. Finally, it passes through the filter 18 and is discharged from the outlet of the silo 3 above the filter 18. The heating circulating air is heated by the condenser 19 from both sides of the space above the filter 18 at the top of the silo 3, and then sent into the bottom of the silo 3 by the heating fan. Similarly, it passes upward through multiple conveyor belts 15 and the sludge layer to dry the sludge. The air inlets of the first heating fan 10 and the second heating fan 12 are staggered and set in the middle of their respective sections.

[0053] In the above embodiments, further, wind deflectors 17 can be installed on both sides of the transmission chain network 15 of each layer, so as to prevent the circulating air from being discharged from the inlet or outlet of the silo body 3.

[0054] As an optional implementation, in some embodiments, a plurality of diffuser plates 20 are provided at the bottom of the storage body 3. The diffuser plates 20 are close to the air outlet pipe 6 of the dehumidifying fan and are inclined upward at a preset first angle. The diffuser plates 20 are distributed at a preset first spacing, and the higher end of the uppermost diffuser plate 20 and the lowermost transmission chain network 15 satisfy a preset second spacing.

[0055] Specifically, referring to Figure 2, a diffuser 20 is installed at the intersection of the air outlet duct 6 of the dehumidifier and the baffle plate 17 below. This diffuser guides and spreads the dehumidified circulating air 4, allowing it to enter the bottom of the storage chamber 3 at an upward angle after passing through the diffuser 20. This ensures that the dehumidified circulating air is evenly distributed to all positions of the conveyor belt 15 from the air inlet to the partition baffle 9, and then passes upward through the conveyor belt 15 and the sludge layer to dry the sludge. The diffuser 20 is a combination of multiple long strip-shaped sheet metal parts stacked vertically. Each diffuser 20 is set at an upward angle of the first angle α, and adjacent diffusers 20 are distributed with a first spacing d1. The higher end of the uppermost diffuser 20 is separated from the lowermost conveyor belt 15 by a second spacing d2. The parameters of the first angle α, the first spacing d1, and the second spacing d2 are determined to ensure that the wind speed of the dehumidified circulating air is evenly distributed when passing through the lowermost conveyor belt 15.

[0056] As an optional implementation, in some embodiments, a flow guide plate is provided at the bottom of the storage body 3. The flow guide plate is located near the air outlet pipe 13 of the heating fan. The flow guide plate includes a flow guide inclined plate 21 and a flow guide plate 22. The lower end of the flow guide inclined plate 21 is connected to the bottom of the storage body 3. The flow guide inclined plate 21 is inclined upward at a preset second angle. The lower end of the flow guide inclined plate 21 and the air inlet of the storage body 3 meet a preset third distance. The flow guide plate 22 is horizontally arranged and one end of the flow guide plate 22 is connected to the higher end of the flow guide inclined plate 21. The flow guide plate 22 and the lowermost transmission chain network 15 meet a preset fourth distance. The other end of the flow guide plate 22 and the wall opposite the air inlet of the storage body 3 meet a preset fifth distance.

[0057] Specifically, referring to Figure 3, a diversion plate is installed at a certain distance directly below the transmission chain network 15 behind the air inlet of the heating circulating air. The diversion plate is divided into a diversion inclined plate 21 and a diversion flat plate 22. The diversion inclined plate 21 can initially change the direction of the air from the diffuser plate 20 and further increase the upward tilt angle. At the same time, the diversion flat plate 22 can divert the upward air to the surrounding horizontal direction when it is blocked by the transmission chain network 15, so that the heating circulating air can be evenly distributed to various positions of the transmission chain network 15. This achieves uniform horizontal spreading and uniform upward speed through the transmission chain network 15 and the sludge layer over a relatively short distance, avoiding excessive wind speed near the wall surface of the transmission chain network 15 due to the short distance from the air inlet to the opposite wall surface, thus affecting its wind speed uniformity. The guide plate extends longitudinally through the space below the transmission chain network 15 corresponding to the single stream of heating air. The lower end of the guide plate 21 is separated from the outlet pipe 13 of the heating fan by a third distance d3. The guide plate is inclined upward at a second angle β. The guide plate 22 is separated from the lowermost transmission chain network 15 by a fourth distance d4. The end of the guide plate 22 is separated from the wall of the storage unit 3 opposite the air inlet by a fifth distance d5. The parameters of the second angle β, the third distance d3, the fourth distance d4, and the fifth distance d5 are determined to ensure that the wind speed of the heating circulating air is evenly distributed when passing through the lowermost transmission chain network 15. In addition, since there is a certain distance between the end of the guide plate 22 and the wall of the storage unit 3 opposite the air inlet, a low-speed vortex zone can be formed below the guide plate, which serves as a dust settling zone 23, thereby facilitating subsequent dust cleaning.

[0058] As an optional implementation, in some embodiments, the air outlet duct 13 of the heating fan is trapezoidal in shape. Since the air outlet of the heating fan is rectangular with a small cross-sectional area, it does not easily diffuse after entering the storage chamber 3. Therefore, the air outlet duct 13 of the heating fan between the air outlet and the storage chamber 3 is set in a trapezoidal shape. This facilitates the initial diffusion of the air from the heating fan, preparing for further diffusion and direction change after passing through the guide plate.

[0059] Secondly, the present invention provides a method for precise air control of a split-type low-temperature drying equipment storage unit, based on the aforementioned precise air control structure of the split-type low-temperature drying equipment storage unit, which specifically includes the following steps:

[0060] Step 1: Model the split-type low-temperature drying equipment silo using computer-aided software to obtain the silo's air control structure model; Step 2: Adjust the specifications of the diffuser and guide plate in the silo's air control structure model, and measure the wind speed of the circulating air at multiple locations on the leeward side of the bottom transmission chain network inside the silo. Calculate the standard deviation of the average wind speed on the leeward side of the bottom transmission chain network based on the wind speed at these multiple locations; Step 3: Compare the obtained standard deviation of the average wind speed with a preset threshold to obtain the comparison result; Step 4: Determine the silo's air control structure based on the comparison result.

[0061] Specifically, in implementing the dimensions and angles of the aforementioned diffusers and guide vanes, a 3D model needs to be created in SolidWorks based on the actual dimensions of the reservoir. Then, CFD simulation of the wind field is performed. First, the model wind field needs to be combined, segmented, named, and have a shared, overlapping topology in Spaceclaim. The model includes the dehumidification circulating air inlet, the heating circulating air inlet, the bottom space of the reservoir, the transport chain network, and the sludge layer combination. Then, the model with the shared, overlapping topology is imported into Ansys Mesh for mesh generation (see Figure 4). The mesh is refined for locations with complex flow field motion, such as the diffusers, guide vanes, and baffles. The meshed model is then imported into Fluent. In the settings panel, Double Precision is selected, and Solver Processes is set to 6. The imported model mesh is then subjected to quality checks and unit conversions. The turbulence model calculates the turbulent motion process in the flow field. Air is set as the moving medium, three air inlets are set as mass inlets, and the outlet is set as a pressure outlet. The wall is set as a no-slip surface boundary condition. The mass flow rate of each air inlet is input in kg / s. The coupled continuity equation and momentum equation are solved using the pressure-velocity coupled Coupled algorithm. The spatial discretization method in the equation is set to the software default. The diffuser and guide plate have the functions of dispersing and homogenizing the air entering the reservoir. By adjusting the specification parameters of the diffuser and guide plate, the parameters with the best uniformity of the lowermost transmission chain network and the leeward side of the sludge layer are simulated to ensure that the standard deviation of the average wind speed is within a certain range. The diffuser and guide plate dimensions that meet the requirements are preset and modeled, and imported into CFD for wind field simulation. After the simulation is completed, the velocity cloud map of the monitoring surface (see Figure 5) is analyzed and calculated to finally determine the first angle α, the second angle β, the first spacing d1, the second spacing d2, the third spacing d3, the fourth spacing d4, and the fifth spacing d5. In this way, by using CFD to simulate the airflow field at the silo intake, the optimal structural dimensions of the diffuser and guide plate are determined through the above steps. This achieves the goals of reducing the amount of dust generated, improving the uniformity of the sludge moisture content, reducing dust generation, and making full use of the circulating air heat, thus ensuring the long-term, efficient, and stable operation of the equipment.

[0062] As an optional implementation, in some embodiments, the specific method for obtaining the standard deviation of the average wind speed on the leeward side of the lowest transmission chain network within the storage facility according to the specification parameters in step 2 is as follows: The leeward side of the lowest transmission chain network is set as the monitoring surface. m parallel line segments are taken at equal intervals along the length of the transmission chain network, with the endpoints of each segment located at the beginning and end points of the network. n wind speed measurement points are then set at equal intervals on each line segment. The standard deviation σ of the average wind speed for each line segment is calculated accordingly. The formula for calculating the standard deviation σ of the average wind speed is as follows:

[0063]

[0064] In the formula, σ is the standard deviation of the average wind speed of each point segment on the leeward side of the bottom transmission link network. This represents the average wind speed data at all points along a single line segment; v i For the measured velocity data, n is the number of wind speed test points on each line segment, and m is the number of line segments. This is the average of the average wind speeds across all line segments.

[0065] Specifically, by calculating the standard deviation of the average wind speed using the above formula and then combining it with the velocity cloud map of the monitoring surface, it is necessary to ensure that the standard deviation of the average wind speed is controlled within 17%. It can be determined that when the first angle ∝ = 45°, the second angle β = 45°, the first spacing d1 = 200mm, the second spacing d2 = 350mm, the third spacing d3 = 250mm, the fourth spacing d4 = 300mm, and the fifth spacing d5 = 300mm, the standard deviation of the average wind speed of the monitoring surface is 14.5%, which is within the control range.

[0066] In the above embodiment, the comparison criterion for step 3 is as follows: if the standard deviation of the average wind speed is less than a preset threshold, proceed to step 4; if the standard deviation of the average wind speed is not less than the preset threshold, return to step 2. Specifically, if the calculated standard deviation of the average wind speed is less than the preset threshold of 17%, it indicates that the airflow uniformity of the lowermost transmission chain network and sludge layer is good, meeting the optimization requirements; if the calculated standard deviation of the average wind speed is greater than or equal to the preset threshold of 17%, it is necessary to determine the location of the high-wind-speed zone on the monitoring surface based on the calculated standard deviation of the average wind speed, adjust the size parameters of the diffuser and diversion plate, and re-verify (see Figure 6).

[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0068] The above embodiments are merely illustrative of the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made based on the essence of the content of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A split-type low-temperature drying equipment storage structure with precise air control, characterized in that, include: The storage unit has a dehumidifying fan and a heating fan connected to its bottom via air ducts. A condenser is installed inside the top of the storage unit, and the condenser is connected to the heating fan via a pipe. A heat source center is located outside the storage unit, connected to the dehumidifying fan and the storage unit via pipes. The bottom of the storage unit is divided into spaces by partitions. Diffusers and guide plates are installed in these spaces according to the airflow of the dehumidifying circulating air from the dehumidifying fan and the heating circulating air from the heating fan, allowing the circulating air to diffuse and spread horizontally and vertically, thus ensuring uniform airflow velocity distribution as it flows towards the top of the storage unit. A conveying assembly is installed inside the storage unit, positioned above the dehumidifying fan and the heating fan, and above the condenser. Below the device, the sludge is dried and dehydrated during transport by dehumidifying and heating circulating air. The conveying assembly includes several conveyor chains arranged from top to bottom. Adjacent conveyor chains move in opposite directions, and their beginnings and ends are staggered to receive and transport the sludge. The lowest conveyor chain is positioned above the discharge port of the silo. The heating circulating air is divided into two streams according to air volume: a first heating circulating air stream and a second heating circulating air stream. The bottom of the silo has three air inlets: one connected to the dehumidifying fan for the dehumidifying circulating air, and the other two connected to the heating fan for the heating circulating air stream. The air inlets of the hot air circulation system each correspond to a specific space, and each space is separated by a partition baffle, allowing each space to be matched with a corresponding airflow. This ensures that the circulating airflow maintains the same velocity within each space, improving ventilation uniformity. Several diffuser plates are installed at the bottom of the storage unit. These diffuser plates are positioned close to the outlet duct of the dehumidifier and tilted upwards at a preset first angle. The diffuser plates are distributed at a preset first spacing, and the higher end of the uppermost diffuser plate meets a preset second spacing with the lowermost transmission chain network. A guide plate is also installed at the bottom of the storage unit. The flow guide plate is positioned near the air outlet duct of the heating fan. The flow guide plate includes a flow guide inclined plate and a flow guide flat plate. The lower end of the flow guide inclined plate is connected to the bottom of the storage body. The flow guide inclined plate is inclined upward at a preset second angle. The lower end of the flow guide inclined plate meets a preset third distance from the air inlet of the heating circulating air of the storage body. The flow guide flat plate is horizontally positioned, and one end of the flow guide flat plate is connected to the higher end of the flow guide inclined plate. The flow guide flat plate meets a preset fourth distance from the lowermost transmission chain network. The other end of the flow guide flat plate meets a preset fifth distance from the wall surface opposite the air inlet of the heating circulating air of the storage body.

2. The split-type low-temperature drying equipment storage precise air control structure according to claim 1, characterized in that, The feed inlet of the silo is connected to a sludge distributor, and the uppermost conveyor chain is located below the discharge outlet of the distributor. The conveying assembly is connected to both the discharge outlet of the distributor and the discharge outlet of the silo.

3. The split-type low-temperature drying equipment storage precise air control structure according to claim 1, characterized in that, It also includes a filter disposed between the condenser and the delivery assembly.

4. The split-type low-temperature drying equipment storage precise air control structure according to claim 1, characterized in that, The outlet pipe of the heating fan is trapezoidal in shape.

5. A method for precise air control of a split-type low-temperature drying equipment storage unit, based on the precise air control structure of the split-type low-temperature drying equipment storage unit as described in any one of claims 1 to 4, comprising the following steps: Step 1: Model the split-type low-temperature drying equipment silo using computer-aided software to obtain the silo's air control structure model; Step 2: Adjust the specifications of the diffuser and guide plate in the silo's air control structure model, and measure the wind speed of the circulating air at multiple locations on the leeward side of the bottom transmission chain network inside the silo. Calculate the standard deviation of the average wind speed on the leeward side of the bottom transmission chain network based on the wind speed at these multiple locations; Step 3: Compare the obtained standard deviation of the average wind speed with a preset threshold to obtain the comparison result; Step 4: Determine the silo's air control structure based on the comparison result.

6. The method for precise air control of a split-type low-temperature drying equipment storage unit according to claim 5, characterized in that, In step 2, the specific method for obtaining the standard deviation of the average wind speed on the leeward side of the lowest transmission chain network within the storage facility based on the specification parameters is as follows: The leeward side of the lowest transmission chain network is designated as the monitoring surface, and measurements are taken at equal intervals along the length of the transmission chain network in the width direction. A series of parallel line segments, with their beginning and end points located at the start and end points of the transmission link network, respectively, and equally spaced line segments are arranged on each line segment. Using a set of wind speed data points, the standard deviation of the average wind speed for each line segment is calculated. Among them, the standard deviation of the average wind speed The calculation formula is as follows: In the formula, The standard deviation of the average wind speed of each point segment on the leeward side of the lowest transmission link network; This represents the average wind speed data at each point on a single line segment; For the velocity data of the measuring point, The number of wind speed test points on each value segment. The number of line segments. This is the average of the average wind speeds across all line segments.

7. The method for precise air control of a split-type low-temperature drying equipment storage unit according to claim 5, characterized in that, The comparison criteria for step 3 are as follows: if the standard deviation of the average wind speed is less than the preset threshold, then proceed to step 4; if the standard deviation of the average wind speed is not less than the preset threshold, then return to step 2.

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